Cấu trúc thì quá khứ đơn với động từ tobe

`  ( + ) `   : S + was / were + ...

`  - `   Chủ ngữ là I / he / she / it + was + ...

`  -`  Chủ ngữ là You / we / they + were + ...

`  ( - ) `   : S + was / were + not + ... 

`  - `   Chủ ngữ là I / he / she / it + was + not + ..

`  -`  Chủ ngữ là You / we / they + were +not +  ...

` ( ? ) ` : Were / Was + S + ... ?

` - ` Was + He / she / it + ... ?

`- `Were + you / we / they + ... ?

Cấu trúc thì quá khứ đơn với động từ thường

` ( + ) ` : S + v-ed / V2

` ( - ) ` : S + didn't + V nguyên mẫu

` ( ? ) ` : Did + S + V nguyên mẫu ?

` -`Các dấu hiệu nhận biết thường gặp : yesterday , last night , ` 5 ` years ago , in the past , ...

` 1 ` : She was a teacher ` 2 ` years ago

` ( - ) ` : She wasn't a teacher ` 2 ` years ago

` ( ? ) ` : Was she a teacher ` 2 ` years ago 

` 2 ` : She played tennis after work yesterday afternoon

` ( - ) ` : She didn't play tennis after work yesterday afternoon

` ( ? ) `  : Did she play tennis after work yesterday afternoon? 

` 3 ` : They cooked dinner last night

` ( - ) ` They didn't cook dinner last night

` ( ? ) ` : Did they cook dinner last night ? 

` 4 ` : He stayed at home last morning

` ( - ) ` : He didn't stay at home last morning

` ( ? ) ` : Did he stay at home last morning ? 

` 5 `They listened English last night

` ( - ) ` They didn't listen English last night

` ( ? ) ` : Did they listen English last night ? 

` 6 `: You studied Japanese 5 year ago

` ( - ) ` You didn't study Japanese 5 year ago

` ( ? ) `Did you study Japanese 5 year ago ?

`1.`

`(-)` She wasn't a teacher 2 years ago

`(?)` Was she a teacher 2 years ago?

`2.` 

`(-)` She didn't play tennis after work yesterday afternoon

`(?)` Did she play tennis after work yesterday afternoon?

`3.`

`(-)` They didn't cook dinner last night

`(?)` Did they cook dinner last night?

`4.` 

`(-)` He didn't stay at home last morning

`(?)` Did he stay at home last morning?

`5.` 

`(-)` They didn't listen English last night

`(?)` Did they listen English last night?

`6.`

`(-)` You didn't study Japanese 5 year ago

`(?)` Did you study Japanese 5 year ago?

`-` Cấu trúc thì QKĐ:

`1.` Động từ thường: 

`(+)` S + V2/ed + O

`(-)` S + didn't + V1 + O..

`(?)` Did + S + V1..?

`->` Yes, S + did

`->` No, S + didn't

`2.` Động từ tobe

`(+)` S + was/ were + N/adj

`(-)` S + was/were + not + N/ adj

`(?)` Was/ were + S + V1...?

`->` Yes, S + Was/ were

`->` No, S + was/ were + not

`-` S là số ít `->` was

`-` S là số nhiều `->` were

`-` DHNB: yesterday, last, ago, in___,...

@_Khahn.Lihz02_